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NVD / CVE Program· CNA mitre

CVE-2019-19391: In LuaJIT through 2.0.5, as used in Moonjit before 2.1.2 and other products, debug.getinfo has a type confusion issue that leads to arbitrar

Noroxi assessment

Priority: Monitor (action score 36/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.3% (FIRST EPSS); higher than 72.4% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: luajit (Debian:11) 2.1.0~beta3+dfsg-5.3+deb11u1; luajit (Debian:12) 2.1.0~beta3+git20210112+dfsg-2; luajit (openSUSE:Tumbleweed) 2.1.20250826-1.1.

Low priority for now. Upgrade to luajit (Debian:11) 2.1.0~beta3+dfsg-5.3+deb11u1; luajit (Debian:12) 2.1.0~beta3+git20210112+dfsg-2; luajit (openSUSE:Tumbleweed) 2.1.20250826-1.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In LuaJIT through 2.0.5, as used in Moonjit before 2.1.2 and other products, debug.getinfo has a type confusion issue that leads to arbitrary memory write or read operations, because certain cases involving valid stack levels and > options are mishandled. NOTE: The LuaJIT project owner states that the debug libary is unsafe by definition and that this is not a vulnerability. When LuaJIT was originally developed, the expectation was that the entire debug library had no security guarantees and thus it made no sense to assign CVEs. However, not all users of later LuaJIT derivatives share this perspective

CriticalCVSS 9.1 · v3.1—No exploit Fix available
Published
Nov 29, 2019
Updated
Jun 16, 2026
EPSS
1.3% · 72th percentile

Report tools

JSON

Action score

36

Monitor

Low priority for now.

CVSS
36 / 40 · 9.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2019-19391

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
luajitluajit
moonjit projectmoonjit

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • luajit luajitup to 2.0.5 inclusive
  • moonjit project moonjitbefore 2.1.2

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:11luajitbefore 2.1.0~beta3+dfsg-5.3+deb11u12.1.0~beta3+dfsg-5.3+deb11u1
Debian:12luajitbefore 2.1.0~beta3+git20210112+dfsg-22.1.0~beta3+git20210112+dfsg-2
openSUSE:Tumbleweedluajitbefore 2.1.20250826-1.12.1.20250826-1.1

Same product

luajit: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-25176LuaJIT through 2.1 and OpenRusty luajit2 before v2.1-20240626 have a stack-buffer-overflow in lj_strfmt_wfnum in lj_strfmt_num.c.
    39Monitor
  • CVE-2024-25178LuaJIT through 2.1 and OpenRusty luajit2 before v2.1-20240314 have an out-of-bounds read in the stack-overflow handler in lj_state.c.
    36Monitor
  • CVE-2020-15890LuaJit through 2.1.0-beta3 has an out-of-bounds read because __gc handler frame traversal is mishandled.
    31Monitor

Published before and after this one in the same product

  • Later →CVE-2020-24372Aug 17, 2020 · LuaJIT through 2.1.0-beta3 has an out-of-bounds read in lj_err_run in lj_err.c.
    30Monitor
  • Later →CVE-2024-25177Jul 7, 2025 · LuaJIT through 2.1 and OpenRusty luajit2 before v2.1-20240314 have an unsinking of IR_FSTORE for NULL metatable, which leads to Denial of Se
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:luajit2.1.0~beta3+git20210112+dfsg-2 · Debian:12Package registry (OSV)
opensuse:luajit2.1.20250826-1.1 · openSUSE:TumbleweedPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-843 · Access of Resource Using Incompatible Type ('Type Confusion')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records